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[31.172.191.173]) by smtp.gmail.com with ESMTPSA id e10sm44291lbr.36.2016.06.20.04.03.59 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 20 Jun 2016 04:04:01 -0700 (PDT) From: Tomasz Nowicki To: marc.zyngier@arm.com, tglx@linutronix.de, jason@lakedaemon.net, rjw@rjwysocki.net, bhelgaas@google.com, lorenzo.pieralisi@arm.com, robert.richter@caviumnetworks.com, shijie.huang@arm.com, Suravee.Suthikulpanit@amd.com, hanjun.guo@linaro.org Cc: al.stone@linaro.org, mw@semihalf.com, graeme.gregory@linaro.org, Catalin.Marinas@arm.com, will.deacon@arm.com, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, ddaney.cavm@gmail.com, okaya@codeaurora.org, andrea.gallo@linaro.org, linux-pci@vger.kernel.org, Tomasz Nowicki Subject: [PATCH V7 8/8] irqchip/gicv3-its: Use MADT ITS subtable to do PCI/MSI domain initialization Date: Mon, 20 Jun 2016 13:02:21 +0200 Message-Id: <1466420541-20101-9-git-send-email-tn@semihalf.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1466420541-20101-1-git-send-email-tn@semihalf.com> References: <1466420541-20101-1-git-send-email-tn@semihalf.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Let ACPI build ITS PCI MSI domain. ACPI code is responsible for retrieving inner domain token and passing it on to its_pci_msi_init_one generic init call. IORT maintains list of registered domain tokens and allows to find corresponding domain based on MADT ITS subtable ID info. Signed-off-by: Tomasz Nowicki Acked-by: Marc Zyngier Reviewed-by: Hanjun Guo --- drivers/irqchip/irq-gic-v3-its-pci-msi.c | 44 ++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) diff --git a/drivers/irqchip/irq-gic-v3-its-pci-msi.c b/drivers/irqchip/irq-gic-v3-its-pci-msi.c index d2c2496..ae7221c 100644 --- a/drivers/irqchip/irq-gic-v3-its-pci-msi.c +++ b/drivers/irqchip/irq-gic-v3-its-pci-msi.c @@ -15,6 +15,7 @@ * along with this program. If not, see . */ +#include #include #include #include @@ -144,9 +145,52 @@ static int __init its_pci_of_msi_init(void) return 0; } +#ifdef CONFIG_ACPI + +static int __init +its_pci_msi_parse_madt(struct acpi_subtable_header *header, + const unsigned long end) +{ + struct acpi_madt_generic_translator *its_entry; + struct fwnode_handle *dom_handle; + const char *node_name; + int err = -ENXIO; + + its_entry = (struct acpi_madt_generic_translator *)header; + node_name = kasprintf(GFP_KERNEL, "ITS@0x%lx", + (long)its_entry->base_address); + dom_handle = iort_find_domain_token(its_entry->translation_id); + if (!dom_handle) { + pr_err("%s: Unable to locate ITS domain handle\n", node_name); + goto out; + } + + err = its_pci_msi_init_one(dom_handle, node_name); + if (!err) + pr_info("PCI/MSI: %s domain created\n", node_name); + +out: + kfree(node_name); + return err; +} + +static int __init its_pci_acpi_msi_init(void) +{ + acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_TRANSLATOR, + its_pci_msi_parse_madt, 0); + return 0; +} +#else +static int __init its_pci_acpi_msi_init(void) +{ + return 0; +} +#endif + static int __init its_pci_msi_init(void) { its_pci_of_msi_init(); + its_pci_acpi_msi_init(); return 0; }